椭芯光纤干涉型多参量光纤传感技术

本文提出用椭圆纤芯高双折射光纤偏振干涉和双模干涉结合的双技术四参量以及双模干涉多参量同时测量的传感理论和实验原理，对交叉灵敏度作了分析，同时给出了误差分析，并结合理论模型对灵敏度矩阵的状态作了粗略估计。初步结果为：（１）灵敏度矩阵条件数不太大，可以采用迭代改善方法解线性方程组得到较好的解；（２）双模干涉传感器的灵敏度比偏振干涉传感器的灵敏度高两个数量级。

Fiber-optic technique for simultaneous measurement of multiparameter in an elliptical-core fiber

In this paper, two fiber optic sensors for simultaneous measurement of multiparameterare presented: one is a polarimetric and two-mode differential interferimetric sensing schemes, and another is a two-mode interferimetric sensor. The cross sensitivity and error are given and the conditionnumbers of the sensitivity metrices utilizing the theoretical model is evaluated. Initial results are: 1.The sensitivity matrices are not very ill-conditioned, so the better solution of equations can be got withthe help of some suitable numerical methods. 2. The sensitivity of the two-mode sensor is as much as100 times that of the polarimetric sensor.